I just got a call from my daughter, who is living in France, and the number came up as "Intl Number" 1-864-607-9404. I hadn't seen that number before, so I didn't answer. She hung up and dialed my cell phone immediately afterward. She told me that she had just called my home phone. She was using her Skype account to make both phone calls, so 1-864-607-9404 must be a number that routes overseas calls to the USA. Sounds like most of the calls that are routed are from telemarketers, but if you know someone using Skype or some similar service, you might want to answer the call.
This number, 864-607-9404 is a Skype number. I know because I use Skype to make my long distance phone calls and I called my home phone and that is what showed up.